Android-开启和关闭wifi的代码段

1·申请权限：

android.permission.ACCESS_WIFI_STATE

android.permission.CHANGE_WIFI_STATE

android.permission.WAKE_LOCK

2·获取WifiManager

wifiManager = (WifiManager) this.getSystemService(Context.WIFI_SERVICE);

3·开启、关闭wifi

if (wifiManager.isWifiEnabled()) { 

wifiManager.setWifiEnabled(false); 

} else { 

wifiManager.setWifiEnabled(true); 

}

4·注意

如果遇到force-close, 选wait即可, 因为启动wifi需要几秒钟, UI如果5妙钟还没反映的话, 系统会给你这个force close exception

Android Wifi的使用

package com.Aina.Android; 

import java.util.List; 

import android.content.Context; 

import android.net.wifi.ScanResult; 

import android.net.wifi.WifiConfiguration; 

import android.net.wifi.WifiInfo; 

import android.net.wifi.WifiManager; 

import android.net.wifi.WifiManager.WifiLock; 

/**

* com.Aina.Android Pro_wifi

* 

* @author Aina.huang E-mail: [e-mail]

* @version 创建时间：2010 Jul 21, 2010 12:29:00 PM 类说明

*/ 

public class WifiAdmin { 

    private WifiManager mWifiManager = null; 

    private WifiInfo mWifiInfo = null; 

    private List<ScanResult> mWifiList = null;// 扫描出的网络连接列表 

    private List<WifiConfiguration> mWifiConfiguration = null;// 网络连接列表 

    private WifiLock mWifiLock = null; 

    public WifiAdmin(Context mContext) { 

        mWifiManager = (WifiManager) mContext 

                .getSystemService(mContext.WIFI_SERVICE); 

        mWifiInfo = mWifiManager.getConnectionInfo(); 

    } 

    public void OpenWifi() { 

        if (!mWifiManager.isWifiEnabled()) { 

            mWifiManager.setWifiEnabled(true);// 打开wifi 

        } 

    } 

    public void CloseWife() { 

        if (mWifiManager.isWifiEnabled()) { 

            mWifiManager.setWifiEnabled(false);// 关闭wifi 

        } 

    } 

    public void lockWifi() { 

        mWifiLock.acquire();// 锁定wifi 

    } 

    public void rlockWifi() { 

        if (mWifiLock.isHeld()) { 

            mWifiLock.acquire();// 解锁wifi 

        } 

    } 

    public void Createwifilock() { 

        mWifiLock = mWifiManager.createWifiLock("Testss");// 创建一个wifilock 

    } 

    public List<WifiConfiguration> GetConfinguration() { 

        return mWifiConfiguration;// 得到配置好的网络 

    } 

    public void ConnectConfiguration(int index) { 

        if (index > mWifiConfiguration.size()) { 

            return; 

        } 

        mWifiManager.enableNetwork(mWifiConfiguration.get(index).networkId, true);//连接配置好的指定ID的网络 

    } 

    public void StartScan() 

    { 

        mWifiManager.startScan(); 

        //得到扫描结果 

        mWifiList = mWifiManager.getScanResults(); 

        //得到配置好的网络连接 

        mWifiConfiguration = mWifiManager.getConfiguredNetworks(); 

    } 

    //得到网络列表 

    public List<ScanResult> GetWifiList() 

    { 

        return mWifiList; 

    } 

    //查看扫描结果 

    public StringBuilder LookUpScan() 

    { 

        StringBuilder stringBuilder = new StringBuilder(); 

        for (int i = 0; i < mWifiList.size(); i++) 

        { 

            stringBuilder.append("Index_"+new Integer(i + 1).toString() + ":"); 

            //将ScanResult信息转换成一个字符串包 

            //其中把包括：BSSID、SSID、capabilities、frequency、level 

            stringBuilder.append((mWifiList.get(i)).toString()); 

            stringBuilder.append("\n"); 

        } 

        return stringBuilder; 

    } 

    //得到MAC地址 

    public String GetMacAddress() 

    { 

        return (mWifiInfo == null) ? "NULL" : mWifiInfo.getMacAddress(); 

    } 

    //得到接入点的BSSID 

    public String GetBSSID() 

    { 

        return (mWifiInfo == null) ? "NULL" : mWifiInfo.getBSSID(); 

    } 

    //得到IP地址 

    public int GetIPAddress() 

    { 

        return (mWifiInfo == null) ? 0 : mWifiInfo.getIpAddress(); 

    } 

    //得到连接的ID 

    public int GetNetworkId() 

    { 

        return (mWifiInfo == null) ? 0 : mWifiInfo.getNetworkId(); 

    } 

    //得到WifiInfo的所有信息包 

    public String GetWifiInfo() 

    { 

        return (mWifiInfo == null) ? "NULL" : mWifiInfo.toString(); 

    } 

    //添加一个网络并连接 

    public void AddNetwork(WifiConfiguration wcg) 

    { 

        int wcgID = mWifiManager.addNetwork(wcg);  

        mWifiManager.enableNetwork(wcgID, true);  

    } 

    //断开指定ID的网络 

    public void DisconnectWifi(int netId) 

    { 

        mWifiManager.disableNetwork(netId); 

        mWifiManager.disconnect(); 

    } 

}